Add console_warn and console_error macros

Author: Ari Breitkreuz

crates/test/src/rt/mod.rs

@@ -233,6 +233,14 @@ extern "C" {
     #[doc(hidden)]
     pub fn js_console_log(s: &str);
 
+    #[wasm_bindgen(js_namespace = console, js_name = error)]
+    #[doc(hidden)]
+    pub fn js_console_error(s: &str);
+
+    #[wasm_bindgen(js_namespace = console, js_name = warn)]
+    #[doc(hidden)]
+    pub fn js_console_warn(s: &str);
+
     // General-purpose conversion into a `String`.
     #[wasm_bindgen(js_name = String)]
     fn stringify(val: &JsValue) -> String;
@@ -243,6 +251,16 @@ pub fn log(args: &fmt::Arguments) {
     js_console_log(&args.to_string());
 }
 
+/// Internal implementation detail of the `console_warn!` macro.
+pub fn log_warn(args: &fmt::Arguments) {
+    js_console_warn(&args.to_string());
+}
+
+/// Internal implementation detail of the `console_error!` macro.
+pub fn log_error(args: &fmt::Arguments) {
+    js_console_error(&args.to_string());
+}
+
 #[wasm_bindgen(js_class = WasmBindgenTestContext)]
 impl Context {
     /// Creates a new context ready to run tests.